Starting current refers to the motor connected to the rated voltage starting from zero speed input line current, asynchronous motor starting current is too large, easy to have a greater impact on electrical equipment and the power grid, the following Senli motor Xiaobao will take you to understand the following three-phase asynchronous motor is the starting current.

       At the moment of power on,Three-phase asynchronous motorIn the static state, because the rotor is stationary, then the rotor speed is0The synchronous rotating magnetic field cuts the rotor winding at the maximum cutting speed, so that the rotor winding senses and achieves the highest electromotive force;

       A large current is generated in the rotor winding, which will offset the flux of the stator magnetic field. In order to maintain the original flux adapted to the power supply voltage, the stator winding will automatically increase the current, because the rotor current is large, and the stator current of the motor will also increase greatly.

       Starting current is under the rated voltage condition, the moment the motor is powered on, the rotor changes from the static state to the running state of the corresponding current, is the process of changing the motor rotor motion state, that is, changing the inertia of the rotor, so the corresponding current will be relatively large.

       When starting directly, the motor starting current is generally rated current5～7Times.Three-phase asynchronous motorStarting current is too large, the motor body and the power grid, have a greater adverse impact, therefore, for large and medium-sized motors, will be soft starting and other ways, the starting current is limited to the rated current2With the continuous improvement of the motor control system, a variety of starting methods such as frequency conversion starting and step-down starting have better solved the problem.

       Three-phase asynchronous motor manufacturersSenli Motor,19Focus on the development and production of electric motors. Available if needed1688Search factory name "Shengzhou Chaoli Electric Appliance Factory" , Or online consultation message, we will have business personnel to get in touch with you, you can also contact us directly0575-8378-1127.